398 MAZATLAN UNIVALVES 



witli blackish, mud, sometimes bearing round flat egg-cases, 

 pierced in the middle. Long. '61, long. spiv. "32, lat. "25, 

 div. (anfr. sup.) 40". 



Hah. — 'B&Y of Guayaquil; Gulf of Magdalena, California, 

 5 — 22 fm. ; JSinds. — Mazatlan ; not uncommon ; Upool Sf 

 Savre Coll. 



Tablet 1902 contains 5 sp. immature. — 1903, 6 sp. adult. — 

 1904, 2 sp. mended after fracture. — 1905, 1 sp. with egg-cases. — 

 1906, 1 sp. ■n-itb operculum ; also 2 separate opercula, one 

 normal, the other with sub-central nucleus. 



468, PDeillia Hanleyi, n. s. 



?D. t. subacuminatd, nigra, epidermide tenui nigro-cinered, 

 indutd ; anfr. .?xi. subplanatis ; canali infrasuturali angiisto 

 et totd swperficie ten-uissime spiraliter striatis ; carina parum 

 irrominente juxta suturam ; costulis radiantihus concinnis, valde 

 acutis, circiter xv. vix declivihus ; aperturd nigrd ; t. adolescente 

 sinu parvo ; t. adidid ? 



Somewhat resembles the young of D. luctuosa, but is known 

 by the fine costse, continued nearly to the base and the infrasu- 

 tural keel. It has some points in common with Defrancia 

 cselata, Hinds, but its analogies seem to be with D. aterrima, 

 &c. The only specimen found (which has its upper whirls 

 smooth) is not quite matm-e, and measures long. '38, long, 

 spir. -24, lat. '15, div. 32". 

 Hab. — Mazatlan ; 1 fresh sp., L'pool Col. 



Tablet 1907 contains the specimen. 



469. Dkillia , sp. ind. 



Tablet 1908 contains a shell, too much rubbed for description, 

 and a spiral fragment which may be couspecific ; reddish 

 brown, with a white spiral band. It closely resembles a W. 

 Indian species. Shell with normal whirls, and a rounded 

 vertex of 3 smooth whirls. Long. '35, lat, '14. 

 Sab. — Mazatlan ; extremely rare, off Spondylus ; L'pool Col. 



470. Dkillia , sp. Ind. 



Tablet 1909 contains a specimen, too much worn for des- 

 cription, of a small turritcd species of about 7 whirls, measuring 



